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    <title>GIS学习与资源平台</title>
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                align-items: center;
                padding: 1rem;
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            .section-grid {
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        }
    </style>
</head>
<body>
    <header class="header">
        <h1>GIS学习与资源平台</h1>
        <p>探索地理信息的无限可能，让数据可视化与空间分析激发你的创造力</p>
    </header>

    <nav class="nav">
        <ul>
            <li><a href="#tutorials"><i class="fas fa-book-reader"></i> 学习教程</a></li>
            <li><a href="#resources"><i class="fas fa-rocket"></i> 资源下载</a></li>
            <li><a href="#notes"><i class="fas fa-lightbulb"></i> 笔记记录</a></li>
            <li><a href="#community"><i class="fas fa-users"></i> 社区交流</a></li>
        </ul>
    </nav>

    <main class="main">
        <section id="tutorials" class="section-grid">
            <div class="card">
                <i class="fas fa-map card-icon"></i>
                <h3>二维GIS教程</h3>
                <p>从基础到进阶的二维GIS技术学习之旅</p>
                <ul class="feature-list">
                    <li>地图制图基础</li>
                    <li>空间分析技术</li>
                    <li>矢量数据处理</li>
                </ul>
                <a href="#" class="btn">开始探索</a>
            </div>

            <div class="card">
                <i class="fas fa-cube card-icon"></i>
                <h3>三维GIS教程</h3>
                <p>探索三维空间的无限可能</p>
                <ul class="feature-list">
                    <li>3D建模技术</li>
                    <li>地形分析</li>
                    <li>三维场景构建</li>
                </ul>
                <a href="#" class="btn">立即起航</a>
            </div>

            <div class="card">
                <i class="fas fa-rocket card-icon"></i>
                <h3>资源中心</h3>
                <p>海量优质资源，助力学习腾飞</p>
                <ul class="feature-list">
                    <li>开源GIS软件</li>
                    <li>示例数据集</li>
                    <li>项目源码库</li>
                </ul>
                <a href="#" class="btn">探索资源</a>
            </div>

            <div class="card">
                <i class="fas fa-satellite card-icon"></i>
                <h3>知识星球</h3>
                <p>记录学习轨迹，分享技术心得</p>
                <ul class="feature-list">
                    <li>智能笔记系统</li>
                    <li>知识图谱构建</li>
                    <li>学习进度追踪</li>
                </ul>
                <a href="#" class="btn">开启旅程</a>
            </div>
        </section>
    </main>

    <footer class="footer">
        <p> 2025 GIS学习与资源平台 - 探索地理信息的无限星空</p>
    </footer>

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